The N-unsubstituted Dewar pyrrole, 1,2,3,4-tetrakis(trifluoromethyl)-5-azabicyclo[2.1.0]pent-2-ene, was synthesized by the reaction of 1,2,3,4-tetrakis(trifluoromethyl)-5-thiabicyclo[2.1.0]pent-2-ene with hydrogen azide followed by photochemical denitrogenation and desulphurization with triphenylphosphine.
Y. Kobayashi, A. Ando and I. Kumadaki, J. Chem. Soc., Chem. Commun., 1978, 509 DOI: 10.1039/C39780000509
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